I want to record a keybord connected by usb in an IMac and only sound like an ambient microphone. What is wrong?

Question

  I want to record a keyboard connected by usb port and only sound like an ambient microphone. What configuration is wrong? Thank you

Answer 1

The optimum choice is to format it ExFAT, but do so on the PC, not the Mac. Alternatively, you can make two partitions - one for the Mac; one for the PC. Partition the drive using GUID when you make the two partitions. Format one using Mac OS Extended, Journaled. Format the other on your PC using NTFS if you won't need to write to it from the OS X side or use ExFAT if you do.
Drive Partition and Format
1. Open Disk Utility in your Utilities folder.
2. After DU loads select your hard drive (this is the entry with the mfgr.'s ID and size) from the left side list. Click on the Partition tab in the DU main window.
3. Under the Volume Scheme heading set the number of partitions from the drop down menu to two. Click on the Options button, set the partition scheme to GUID then click on the OK button. Set the format type to Mac OS Extended (Journaled.) Click on the Apply button and wait until the process has completed.
4. Select the volume you just created (this is the sub-entry under the drive entry) you will use for Windows from the left side list. Click on the Erase tab in the DU main window.
5. Set the format type to MSDOS.
6. Click on the Erase button.
When you connect the drive to your PC reformat the PC volume to either NTFS or ExFAT.